11280312 has 24 divisors (see below), whose sum is σ = 30551040. Its totient is φ = 3760080.

The previous prime is 11280307. The next prime is 11280317. The reversal of 11280312 is 21308211.

It is an interprime number because it is at equal distance from previous prime (11280307) and next prime (11280317).

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11280317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78264 + ... + 78407.

It is an arithmetic number, because the mean of its divisors is an integer number (1272960).

Almost surely, 2^11280312 is an apocalyptic number.

11280312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11280312 is an abundant number, since it is smaller than the sum of its proper divisors (19270728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11280312 is a wasteful number, since it uses less digits than its factorization.

11280312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156683 (or 156676 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 11280312 is about 3358.6175727522. The cubic root of 11280312 is about 224.2713018023.

Adding to 11280312 its reverse (21308211), we get a palindrome (32588523).

The spelling of 11280312 in words is "eleven million, two hundred eighty thousand, three hundred twelve".